package com.sky.service.impl;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    public static final String CANCEL_REASON_USER = "用户取消";
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     */
    @Transactional
    @Override
    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO) {
        Long userId = BaseContext.getCurrentId();
        /**
         * 处理异常
         */
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        AddressBook addressBook = addressBookMapper.selectById(addressBookId, userId);
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if ((shoppingCartList == null) && shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        User user = userMapper.getById(userId);
        /**
         * 向订单表插入一个数据,向订单明细表插入多条数据
         */
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);
        order.setOrderTime(LocalDateTime.now());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        String address = addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail();
        order.setAddress(address);
        order.setUserName(user.getName());
        order.setPhone(addressBook.getPhone());
        order.setConsignee(addressBook.getConsignee());
        order.setPayStatus(Orders.UN_PAID);
        order.setStatus(Orders.PENDING_PAYMENT);
        orderMapper.insert(order);

        ArrayList<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        shoppingCartMapper.clean(userId);
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderTime(order.getOrderTime())
                .orderAmount(order.getAmount())
                .orderNumber(order.getNumber())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
        JSONObject jsonObject = new JSONObject();
        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo, BaseContext.getCurrentId());

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        Map map = new HashMap();
        map.put("type", 1);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号:" + outTradeNo);
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }


    /**
     * 查询订单详细
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        //查询订单信息
        Orders orders = orderMapper.getById(id);
        //根据订单id查询订单详细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        OrderVO orderVO = new OrderVO();
        orderVO.setOrderDetailList(orderDetailList);
        BeanUtils.copyProperties(orders, orderVO);
        return orderVO;
    }

    /**
     * 历史订单查询
     *
     * @return
     */
    @Override
    public PageResult pageQueryUser(int pageNum, int pageSize, Integer status) {

        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        ArrayList<OrderVO> list = new ArrayList<>();
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {

                Long orderId = orders.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);

            }

        }
        return new PageResult(page.getTotal(), list);
    }


    /* 取消订单
     * @param id
     */
    @Override
    public void cancel(Long id) {
        Orders orderDB = orderMapper.getById(id);
        if (orderDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (orderDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders od = new Orders();
        od.setId(orderDB.getId());
        if (orderDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {

            od.setPayStatus(Orders.REFUND);
            log.info("退款成功");
        }
        od.setStatus(Orders.CANCELLED);
        od.setCancelReason(CANCEL_REASON_USER);
        od.setCancelTime(LocalDateTime.now());
        orderMapper.update(od);
        log.info("取消成功");
    }

    @Override
    public void repetition(Long id) {
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        //分页查询所有订单
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        //封装对象,返回结果
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> OrderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(), OrderVOList);
    }

    /**
     * 统计各个状态订单数
     *
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {

        Orders orders = new Orders();
        Long id = ordersConfirmDTO.getId();
        orders.setId(id);
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    /**
     * 商家拒单
     *
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders orderDB = orderMapper.getById(ordersRejectionDTO.getId());
        if (orderDB == null && !orderDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        String rejectionReason = ordersRejectionDTO.getRejectionReason();
        Long id = ordersRejectionDTO.getId();
        Orders orders = new Orders();
        orders.setStatus(Orders.CANCELLED);
        orders.setId(id);
        orders.setRejectionReason(rejectionReason);
        orders.setCancelTime(LocalDateTime.now());
        orders.setPayStatus(Orders.REFUND);
        orderMapper.update(orders);
    }

    @Override
    public void cancelAdmin(OrdersCancelDTO ordersCancelDTO) {
        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orders.setPayStatus(Orders.REFUND);
        orderMapper.update(orders);
    }

    /**
     * 商家派送订单
     *
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders orderDB = orderMapper.getById(id);
        if (orderDB == null || !orderDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders orderDB = orderMapper.getById(id);
        if (orderDB == null || !orderDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 客户催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders orderDB = orderMapper.getById(id);

        if (orderDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap();
        map.put("type", 2);
        map.put("orderId", orderDB.getId());
        map.put("content", "订单号:" + orderDB.getNumber());
        String json = JSON.toJSONString(map);
        //通过webSocket推送
        webSocketServer.sendToAllClient(json);
    }


    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        //获取订单信息
        List<Orders> ordersList = page.getResult();
        List<OrderVO> orderVOList = new ArrayList<>();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishStr = getOrderDishStr(orders.getId());
                orderVO.setOrderDishes(orderDishStr);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    private String getOrderDishStr(Long id) {
        //根据订单id获取订单详细信息
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        List<String> orderDishList = orderDetailList.stream().map(od -> od.getName() + "*" + od.getNumber() + ";"
        ).collect(Collectors.toList());
        return String.join("", orderDishList);
    }

    public void cancel(OrdersCancelDTO ordersCancelDTO) {

    }

}
